package com.sky.service.impl;

import com.github.pagehelper.Constant;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;


//    @Autowired
//    private CategoryMapper categoryMapper;


    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        log.info("dish:{}", dish);
        dishMapper.save(dish);
        log.info("dishId:{}", dish.getId());
        Long id = dish.getId();

        //向口味表插入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors != null && flavors.size() > 0) {
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(id);
            }
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    public PageResult pageDish(DishPageQueryDTO dishPageQueryDTO) {

        //方法一
//        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
//        Page<Dish> dishPage = dishMapper.queryPage(dishPageQueryDTO);
//        List<Dish> dishPageResult = dishPage.getResult();
//        List<DishVO> dishVOList = new ArrayList<>();
//        for (Dish dish : dishPageResult) {
//            DishVO dishVO = new DishVO();
//            BeanUtils.copyProperties(dish,dishVO);
//            Long categoryId = dish.getCategoryId();
//            String categoryName = categoryMapper.queryNameByCategoryId(categoryId);
//            dishVO.setCategoryName(categoryName);
//            dishVOList.add(dishVO);
//        }
//
//        long total = dishPage.getTotal();
//
//        return new PageResult(total,dishVOList);


        //方法二

        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> dishVOPage = dishMapper.queryPage(dishPageQueryDTO);
        return new PageResult(dishVOPage.getTotal(), dishVOPage.getResult());


    }

    /**
     * 批量删除菜品
     *
     * @param ids
     */
    @Transactional
    public void deleteBatch(String[] ids) {

        for (String id : ids) {
            //判断菜品是否能够删除--是否存在启售中的菜品？
            Dish dish = dishMapper.getById(id);

            if (dish == null) {
                throw new DeletionNotAllowedException(MessageConstant.UNKNOWN_ERROR);
            }
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }

        }

        //判断当前菜品是否能够删除--是否被套餐关联了？
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        for (String id : ids) {
            //删除菜品表中的菜品数据
            dishMapper.removeById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.removeByDishId(id);
        }

    }

    /**
     * 菜品启售停售
     *
     * @param status
     * @param id
     */
    public void dishOpenOrClose(String status, String id) {
        Dish dish = new Dish();
        dish.setId(Long.valueOf(id));
        dish.setStatus(Integer.valueOf(status));
        dishMapper.update(dish);
    }

    /**
     * 根据id查询菜品
     *
     * @param id
     * @return
     */
    public DishVO findDishWithFlavorsById(Long id) {
        Dish dish = dishMapper.getById(String.valueOf(id));
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);

        List<DishFlavor> dishFlavors = dishFlavorMapper.findDishFlavorsByDishId(id);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 更新菜品和口味数据
     *
     * @param dishDTO
     */
    @Transactional
    public void
    updateDishWithFlavorsById(DishDTO dishDTO) {

        //1、更新菜品信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.update(dish);

        //2、删除原有口味信息
        Long dishId = dishDTO.getId();
        dishFlavorMapper.removeByDishId(String.valueOf(dishId));


        //3、新增所有对应的口味信息
        List<DishFlavor> flavorList = dishDTO.getFlavors();

        if (flavorList != null && flavorList.size() > 0) {
            for (DishFlavor dishFlavor : flavorList) {
                dishFlavor.setDishId(dishId);
            }

            dishFlavorMapper.insertBatch(flavorList);
        }

    }

    /**
     * 动态条件查询菜品
     *
     * @param dish
     * @return
     */
    public List<Dish> list(Dish dish) {

        List<Dish> dishList = dishMapper.list(dish);

        return dishList;
    }


    /**
     * 条件查询菜品和口味
     *
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {

        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.findDishFlavorsByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
